28694218 has 16 divisors (see below), whose sum is σ = 51779520. Its totient is φ = 11650176.

The previous prime is 28694207. The next prime is 28694221. The reversal of 28694218 is 81249682.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53671 + ... + 54202.

It is an arithmetic number, because the mean of its divisors is an integer number (3236220).

Almost surely, 2^28694218 is an apocalyptic number.

28694218 is a deficient number, since it is larger than the sum of its proper divisors (23085302).

28694218 is a wasteful number, since it uses less digits than its factorization.

28694218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107901.

The product of its digits is 55296, while the sum is 40.

The square root of 28694218 is about 5356.6984234694. The cubic root of 28694218 is about 306.1480266907.

The spelling of 28694218 in words is "twenty-eight million, six hundred ninety-four thousand, two hundred eighteen".